Really all of the above. Raising the min times again, requiring higher jet and turbine times. College degree required and not preferred. Almost every place that list College preferred will only hire College educated. Time in type is making a comeback too. For a while that was not really a required like before the pilot 'shortage'. Also, so many mainline airline pilots the retire at 65 apply into Part 135 or Part 91 Corporate flying and it makes it tougher on younger guys trying to get started. I am not agreeing with all of this but all this is happening.